flannel exited: failed to register flannel network: could not create wireguard interface: operation not supported

[DokiDoki1103]

Environmental Info:
K3s Version: v1.28.7+k3s1

Node(s) CPU architecture, OS, and Version: Linux pt796eib 3.10.0-957.el7.x86_64 #1 SMP Thu Nov 8 23:39:32 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Cluster Configuration:1 servers 2agents

Describe the bug:

Steps To Reproduce:

• Installed K3s:

Expected behavior:

Actual behavior:

Additional context / logs:

ct 24 21:37:47 pt796eib k3s[14946]: I1024 21:37:47.181722 14946 desired_state_of_world_populator.go:159] "Finished populating initial desired state of world"
Oct 24 21:37:47 pt796eib k3s[14946]: I1024 21:37:47.416241 14946 kube.go:146] Node controller sync successful
Oct 24 21:37:47 pt796eib k3s[14946]: time="2024-10-24T21:37:47+08:00" level=error msg="flannel exited: failed to register flannel network: could not create wireguard interface: operation not supported"
Oct 24 21:37:47 pt796eib systemd[1]: k3s-agent.service: main process exited, code=exited, status=1/FAILURE
Oct 24 21:37:47 pt796eib systemd[1]: Unit k3s-agent.service entered failed state.
Oct 24 21:37:47 pt796eib systemd[1]: k3s-agent.service failed.
Oct 24 21:37:52 pt796eib systemd[1]: k3s-agent.service holdoff time over, scheduling restart.
Oct 24 21:37:52 pt796eib systemd[1]: Stopped Lightweight Kubernetes.
Oct 24 21:37:52 pt796eib systemd[1]: Starting Lightweight Kubernetes...

[DokiDoki1103]

use wireguard-native
centos7.6 not work
ubuntu is work

[brandond]

Do you have the wireguard kernel module installed? I suspect it is not available out of the box on a distro as old as Centos 7.